Excellent performanceIntelligent coaster, supports both heating and cooling, onekey cooling and constant temperature heating. Sophisticated technologyThe semiconductor refrigeration chip consumes less power and improves the speed of heat preservation/cold preservation. MultipurposeSuitable for most flatbottomed cups, beverage cans, cans, ceramic cups, glass cups, stainless steel cups, etc. on the market. Professional designSimple appearance, plug and play, with USB interface, compact and portable, suitable for office and home. Durable to useUsing ABS engineering plastics, it has strong durability and durability, antileakage, and high safety. Specification: Item Type: Electric Cup Mat Product Color: White Product Model: C-100+ Rated Power: 10W Product Voltage: 5V/2A Weight: Approx. 465g / 16.4oz Effective Line Length: 93cm / 36.6in Product Size: Approx. 140x90x35mm / 5.5x3.5x1.4in Package List: 1 x Heating Cooling Coaster Note: 1. Please allow 01 inch error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. 3. Doublelayer cups and thick bottom cups are not suitable. It is recommended that the bottom of the cup be flat. 4. The function of this product is to keep warm and cold. It cannot be used to boil water.